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The Single UNIX &reg; Specification, Version 2<br>
Copyright &copy; 1997 The Open Group

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<h4><a name = "tag_002_001_117">&nbsp;</a>NAME</h4><blockquote>
use_env - specify source of screen size information
</blockquote><h4><a name = "tag_002_001_118">&nbsp;</a>SYNOPSIS</h4><blockquote>
<pre><code>

#include &lt;<a href="curses.h.html">curses.h</a>&gt;

void use_env(bool <i>boolval</i>);
</code>
</pre>
</blockquote><h4><a name = "tag_002_001_119">&nbsp;</a>DESCRIPTION</h4><blockquote>
The
<i>use_env()</i>
function specifies the technique by which the
implementation determines the size of the screen.  If <i>boolval</i> is FALSE,
the implementation uses the values of <i>lines</i> and <i>columns</i> specified
in the <b>terminfo</b> database.  If <i>boolval</i> is TRUE, the implementation uses
the
and
environment variables.  The initial value is TRUE.
<p>
Any call to
<i>use_env()</i>
must precede calls to
<i><a href="initscr.html">initscr()</a></i>,
<i><a href="newterm.html">newterm()</a></i>
or
<i><a href="setupterm.html">setupterm()</a></i>.
</blockquote><h4><a name = "tag_002_001_120">&nbsp;</a>RETURN VALUE</h4><blockquote>
The function does not return a value.
</blockquote><h4><a name = "tag_002_001_121">&nbsp;</a>ERRORS</h4><blockquote>
No errors are defined.
</blockquote><h4><a name = "tag_002_001_122">&nbsp;</a>SEE ALSO</h4><blockquote>
<i><a href="del_curterm.html">del_curterm()</a></i>,
<i><a href="initscr.html">initscr()</a></i>,
<i><a href="curses.h.html">&lt;curses.h&gt;</a></i>.
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UNIX &reg; is a registered Trademark of The Open Group.<br>
Copyright &copy; 1997 The Open Group
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